Oil-well derrick



C. M. HEETER 7 June 16, 1925.

Filed March 2.

1922 2 Sheets-Sheet 1 June 16, 1925. ,r 1,541,811

. c. HEIETER OIL WELL DERRICK Filed March 2, 1922 2 Sheets-Sheet 2 INVENTOR I tion of a Patented June 16, 1925.

cnaanns m; Hearse, or BUTLER, PENNSYLVANIA.

oIL- ELL nnamcx.

Application ma March 2,. 1922. Serial No. 540,432.

To all whom it may concern:

Be it knownthat I, CHARLES M. Hsn'rnn,

a citizen of the United States, residing'at Butler, in the county of Butler and State of Pennsylvania, have invented a new and use"- ful Improvement in Oil-Well Derricks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of in which: l'is a perspective view of a'porderrick constructed in accordance with the present invention;

Figure-2 1s a detail sectional view on an enlarged scale illustrating a portion of; the

this specification,

Figure derrick Figure 3 is a transverse sectional view through the construction illustrated in Figure 2; and

.Figure 4 is a view, corresponding-to Fig: ure 3, but illustrating a slightly modified form of construction.

building constructions, larl to wooden tower structures, wel derricks and the like.

It has heretofore been customary to con- The present invention relates broadly to and more particusuch as oil struct oil well derricks by securing all of the parts in position-with ordinarybolts. This requires drilling bolt holes through comparatively narrow pieces and in many cases adjacent the edge of other pieces. Such o enings have fr uently resulted in splitting of the respective pieces, thereby correspondingly weakening the entire structure.

Furthermore, with such constructions accurate 'alignment of all .of the openings is required thereby making the assemblying operation a tedious one.

rusted in place.

the use of a large number of ordina?th ere- Frequently it. is desired to knock down derricks of this nature and assemble them' Experience has shown that where the parts are bolted together throughin other places.

out with straight bolts, the-removal of the bolts is extremely diflicult due to the fact that they rapidly become oxidized and In; accordance with the present inventitin,

0 ts is eliminated and there are substitute for U-bolts adapted to span certain pleces 1n the construction, thereby e'essity of drilling the same. This makes the derrick easier toassemble, easierto knock down and strengthens theentire structure.

' Referring more particularly to the drawobviating the ne-' 'ings, there is illustrated a portion of a derrick comprising four main corner structures A, each consisting prlmarlly-of substantially vertically extending sectional I members 2 and 3 with broken oints arranged at approximately right angles to each other. The pieces of each corner structure are firmly clamped in place by U-bolts 4, adapted to straddle the pieces 3 on opposite sides of the joints, and having one leg extending through the pieces 2. Cooperating with the outer ends of theleg of each U-bolt may b provided a clipor washer 5 adapted.

to be engaged bythe clamping nuts 6 for drawing and holding the members 2 and 3 in position. v I

The corner structures thus assembled, are in turn held in proper cooperative relation by transversely extending girts.7, the ends of which are engaged by an le irons-8, through which extend bolts 9 o usual construction. Intermediate the girts 7 maybe rovided diagonally extending reinforcing races 10. i,

The sections forming th members 2 and 3 are cut to such lengths that the joints be-' tween sections Wlll be located at approximately the center of one set of girts 7 Preferably, I out these sections of such a length that each of theintermediate sections of the upright members 2 and 3 will extend from the center of one set of girts over the next set and to the center of the next set, as clearly shown in Fig. 1 of the drawings. This permits me to make relatively short sections of columns or corner forming mem-' bers, also permits me to break the joints'of the sections forming members 2 and 3 so that the joint between two sections of one member are reinforced by a section of the other member. As I preferably make the joints at the points where the girts are secured to the members 2 and 3, the joints between the sections of each member are not only reinforced by the other member but are also reinforced by the girts.

Where it is desired extra; heavy spective members. constituting the corner structures may be increased as illustrated in Figure4. In this figure the pieces 3. are clamped between the legs of the U-bo'lts 4', both of which extend through the piece 2'. 'In this construction there may be provided a clip tio'n'of the U-bolt to prevent the same from to provide a derrick of construction, the sizes of the reor hearing 11 for the inner por- I being drawn into the piece 3', while a heavier clip 12, corresponding to the clips 5 already'described, me be provided for the outer ends of the U-bo ts.'

In either form of the invention illustrated it will be apparent that the main ortions of the structure are held in assemb ed relation by U-bolts which embrace the pieces 3 and 3, thereby obviating the'necessity of drilling bolt, openings through these pieces. In this manner the original strength of the pieces 3' is conserved, and the are clamped 1n position in-such manner t at the entire structure may be readily knocked down as desired. These constitute important advantages of the present invention.

I claim: 2

1. A derrick having a plurality of supporting columns, each column being formed of two members at an angle to each other, each member bein formed of a plurality of sections, the joints etween the sections of one member being staggered relative to the oints between the sections of the other memer, and a U clamp on each side of each joint, said clamps straddling one member to clamp three sections of the two column forming members to each other, the one section of one member forming a reinforce for the ends of two sections of the other member.

2. A derrick having a plurality of supporting columns, each column being formed of two members at an angle to each other, each member being formed .of a plurality of sections, the joints between the sections of one member being staggered relative to the joints between the sections of the other member, a plurality of sets of girts connecting the columns to each other, each joint of the column sections being overlapped by a girt, and a U clamp on each side of each girt connecting the column members to each other.

In testimony whereof I have hereunto set my hand.

CHARLES M. HEETER. 

